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# from fastapi import FastAPI, Query, HTTPException
import hmac
import hashlib
from fastapi import FastAPI, Header, HTTPException, Request, Query
from typing import Optional
app = FastAPI()
VERIFY_TOKEN = "lintasmediadanawa" # Replace with your actual verify token
@app.get("/webhooks")
async def handle_webhook(
hub_mode: str = Query(..., alias="hub.mode"),
hub_challenge: int = Query(..., alias="hub.challenge"),
hub_verify_token: str = Query(..., alias="hub.verify_token")
):
if hub_mode == "subscribe" and hub_verify_token == VERIFY_TOKEN:
return int(hub_challenge)
else:
raise HTTPException(status_code=403, detail="Verification failed")
@app.post("/webhooks")
async def handle_event_notifications(
request: Request,
x_hub_signature_256: Optional[str] = Header(None) # Header for signature verification
):
# Read and verify the request body
body = await request.body()
# Verify the X-Hub-Signature-256 header
if not x_hub_signature_256:
raise HTTPException(status_code=400, detail="Missing X-Hub-Signature-256 header")
# Compute the expected signature
expected_signature = (
"sha256="
+ hmac.new(VERIFY_TOKEN.encode(), body, hashlib.sha256).hexdigest()
)
if not hmac.compare_digest(expected_signature, x_hub_signature_256):
raise HTTPException(status_code=403, detail="Signature verification failed")
# Parse the JSON payload
payload = await request.json()
object_type = payload.get("object")
entries = payload.get("entry", [])
# Log the received event (or process as needed)
for entry in entries:
changes = entry.get("changes", [])
for change in changes:
field = change.get("field")
value = change.get("value")
# Handle specific fields or values as required
print(f"Received change for field: {field}, value: {value}")
# Return a 200 OK response to acknowledge receipt
return {"status": "ok"}
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